void MainWindow::searchNext()
{
    QString strsearch = ui->edSearch->text();

    if (strsearch.isEmpty()) {
        QMessageBox::warning(this, tr("QSig"), kor("검색어 입력이 필요합니다. !!!"));
        ui->edSearch->setFocus();
        return;
    }

    int count = 0;
    bool isSearch = false;
    int tabint = ui->tabWidget->currentIndex();
    QWidget *widget =  editorList->at(tabint);
    widget->setFocus();

    if (QApplication::focusWidget()->inherits("CodeEditor")) {
         CodeEditor *myeditor = static_cast<CodeEditor*>(QApplication::focusWidget());
         document = myeditor->document();
     }


    //document->setDefaultStyleSheet("background-color: red");

    QTextCursor highlightCursor(document);
    QTextCursor cursor(document);

    cursor.beginEditBlock();

    QTextCharFormat plainFormat(highlightCursor.charFormat());
    QTextCharFormat colorFormat = plainFormat;

    plainFormat.clearBackground();

    colorFormat.setBackground(Qt::yellow);

    while (!highlightCursor.isNull() && !highlightCursor.atEnd())
    {
    //       p.setColor(QPalette::Base, QColor("#f8f8f8"));
    //XXX     if (searchTextList.contains())

        if (!highlightCursor.isNull())
        {
        count++;
        //매칭되는 문자열을 기본으로, 대소문자 구분은 QTextDocument::FindCaseSensitively, wholeword 는 QTextDocument::FindWholeWords임
        highlightCursor = document->find(strsearch,  highlightCursor, 0);
        highlightCursor.movePosition(QTextCursor::WordRight,  QTextCursor::KeepAnchor);
        highlightCursor.mergeCharFormat(colorFormat);
        isSearch = true;
        }
    }
    cursor.endEditBlock();

    if (isSearch)
        searchTextList.append(strsearch);

    //search result was plus 1
    count--;

    if (count > 0)
        ui->logEdit->append(strsearch + kor(" 해당하는 문자열을 총 ") +  QString::number(count) + kor("개 찾았어요. !!!"));
    else
       QMessageBox::information(this, tr("QSig"), strsearch + kor("에 해당하는 문자열이 없어요. !!!"));

}